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      <title>DevOps文化与实践 - 交互式测验</title>
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      </style>
    </head>
    <body>
      <div class="main-wrapper">
          <div class="quiz-container">
            <div class="quiz-header">
              <h1>DevOps文化与实践 - 交互式测验</h1>
              <p>检验你对文档内容的理解程度</p>
            </div>
            <div id="quiz-content">
                <div class="quiz-body">
                    <div class="progress-bar">
                        <div id="progress-indicator"></div>
                    </div>
                    <div id="question-container">
                      <p id="question-text"></p>
                      <ul class="options-list" id="options-list"></ul>
                    </div>
                    <div id="result-container"></div>
                    <div id="hint-container" class="hint-container"></div>
                </div>
                <div class="quiz-footer" id="quiz-footer">
                  <button id="prev-btn" class="nav-btn">上一题</button>
                  <button id="hint-btn" class="nav-btn" style="background-color: #ffc107; color: #333; box-shadow: 0 4px 12px rgba(255,193,7,0.3);">提示</button>
                  <button id="next-btn" class="nav-btn">下一题</button>
                </div>
            </div>
          </div>
      </div>

      <script>
        const quizData = [
  {
    "question": "根据文档，DevOps文化的核心理念是什么？",
    "options": [
      "完全用自动化工具取代运维人员，降低人力成本。",
      "打破开发（Dev）与运维（Ops）之间的壁垒，通过协作和自动化实现快速、高质量的交付。",
      "强制要求开发人员承担所有的线上运维工作。",
      "专注于加快编码速度，而忽略测试和部署环节。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "文档明确指出，DevOps文化的核心是打破开发与运维之间的壁垒，通过自动化工具、协作和持续反馈，实现开发、测试和运维人员的紧密合作，最终提升软件质量和响应速度。",
    "source": "文档中「1.1 DevOps的核心理念」部分",
    "hint": "思考一下 'Dev' 和 'Ops' 这两个词的结合意味着什么，它强调的是团队间的关系。"
  },
  {
    "question": "文档中提到的并发编程一大挑战是“线程安全”，当多个线程在没有适当同步机制的情况下访问共享资源时，最可能导致什么问题？",
    "options": [
      "数据不一致",
      "编译错误",
      "网络连接中断",
      "服务器硬件过热"
    ],
    "correctAnswerIndex": 0,
    "explanation": "文档在“线程安全与共享资源”一节中明确指出，当多个线程同时访问共享资源时，如果没有合理的同步机制（如锁），会导致数据不一致的情况，这是线程安全问题的核心表现。",
    "source": "文档中「2.1 线程安全与共享资源」部分",
    "hint": "想象一下，当多个人同时编辑同一个在线文档且没有锁定功能时，文档内容会变成什么样？"
  },
  {
    "question": "在DevOps实践中，哪种部署策略被特别提及，用于安全地发布新版多线程应用，并能在出现问题时快速回滚？",
    "options": [
      "一次性全量部署 (Big Bang Deployment)",
      "瀑布式部署 (Waterfall Deployment)",
      "蓝绿部署 (Blue-Green Deployment) 或 灰度发布 (Canary Releases)",
      "手动备份部署 (Manual Backup Deployment)"
    ],
    "correctAnswerIndex": 2,
    "explanation": "文档中提到，通过使用蓝绿部署和灰度发布等策略，可以在新版本上线时，分阶段将用户流量切换到新版本，以此来验证其在生产环境中的并发处理能力，并在发生性能下降或线程安全问题时迅速回滚到稳定版本。",
    "source": "文档中「3.3 持续部署（CD）与并发编程的可靠性」部分",
    "hint": "这种部署方式类似于为新版本准备一个“备用环境”或只让一小部分用户先体验，以降低全量上线的风险。"
  },
  {
    "question": "根据文档，应用性能管理（APM）工具在处理并发编程问题时，主要扮演什么角色？",
    "options": [
      "自动编写和修复并发代码中的错误。",
      "实时监控应用性能，帮助识别性能瓶颈、死锁和资源竞争。",
      "在代码提交前静态分析代码，发现潜在的并发漏洞。",
      "为应用程序动态增加计算资源以提高并发能力。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "APM工具（如New Relic、Datadog）的核心作用是实时监控应用程序的性能指标（如响应时间、CPU使用率、内存消耗），这对于发现和诊断并发代码中难以通过静态分析找到的性能瓶颈、死锁等问题至关重要。",
    "source": "文档中「4.3 APM工具与性能监控」部分",
    "hint": "这类工具是开发和运维团队的“眼睛”，用来实时观察线上应用的“健康状况”。"
  },
  {
    "question": "文档指出了一个可能导致并发程序执行效率低下的性能开销，它是由什么直接引起的？",
    "options": [
      "线程创建本身消耗的内存空间。",
      "操作系统进行过多的线程调度和上下文切换。",
      "网络延迟导致的线程间通信变慢。",
      "使用过多的同步锁导致的逻辑复杂。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "文档在“线程调度与上下文切换”部分明确说明，线程的调度和上下文切换会带来性能开销。当线程数量过多或切换频繁时，这种开销会变得显著，可能导致程序的整体执行效率低下。",
    "source": "文档中「2.2 线程调度与上下文切换」部分",
    "hint": "当操作系统在多个任务之间来回切换时，它需要保存当前任务的状态并加载下一个任务的状态，这个过程本身是需要消耗时间的。"
  },
  {
    "question": "在DevOps实践中，持续集成（CI）流程如何帮助优化并发编程？",
    "options": [
      "自动将代码直接部署到生产服务器。",
      "通过自动化构建和并行测试，在早期识别并发代码的性能瓶颈和线程安全问题。",
      "为项目自动选择最优的并发模型。",
      "强制开发者遵循统一的编码风格以减少错误。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "文档指出，CI流程通过频繁地集成代码并进行自动化构建和测试，可以帮助团队识别并发代码中的性能瓶颈。同时，自动化测试也可以模拟并发场景，提前发现线程安全问题，从而在早期阶段解决问题。",
    "source": "文档中「3.2 持续集成（CI）与并发代码优化」和「3.1 自动化测试与并发问题」部分",
    "hint": "CI的核心价值在于“频繁集成”和“自动化反馈”，这使得问题能被尽早发现。"
  },
  {
    "question": "文档中提到的死锁（Deadlock）问题，其产生的主要原因是什么？",
    "options": [
      "单个线程请求了一个不存在的资源。",
      "操作系统无法为新线程分配足够的内存。",
      "多个线程因执行速度不一致而导致数据错乱。",
      "多个线程在互相等待对方已经持有的资源，导致所有相关线程都无法继续执行。"
    ],
    "correctAnswerIndex": 3,
    "explanation": "根据文档定义，死锁是由于多个线程在互相等待资源而导致程序无法继续执行的现象。一个典型的例子是：线程A持有资源1并等待资源2，而线程B持有资源2并等待资源1，两者互相等待，形成僵局。",
    "source": "文档中「2.3 死锁和竞态条件」部分",
    "hint": "想象两个人要交换手里的东西，但都坚持“你必须先给我，我再给你”，结果会怎样？"
  }
];
        console.log("Quiz Data:", JSON.parse(JSON.stringify(quizData))); // 添加这行用于调试，以可展开的JSON格式输出
        
        let currentQuestionIndex = 0;
        let score = 0;
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        const hintBtn = document.getElementById('hint-btn');
        const hintContainerEl = document.getElementById('hint-container');

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          optionsListEl.innerHTML = '';
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            nextBtn.style.display = 'block';
            hintBtn.style.display = 'block'; // 显示提示按钮

            prevBtn.disabled = currentQuestionIndex === 0;
            nextBtn.disabled = false; // 最后一题时，下一题按钮不禁用，而是用于显示报告
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        function showResult(isCorrect, questionData) {
            resultContainerEl.innerHTML = ''; // 清空之前的结果
            const resultBox = document.createElement('div');
            resultBox.className = `result-box ${isCorrect ? 'correct' : 'incorrect'}`;
            
            let html = `<h3>${isCorrect ? '回答正确！' : '回答错误'}</h3>`;
            if (!isCorrect) {
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            }
            html += `<div class="explanation-text">${questionData.explanation}</div>`;
            html += `<div class="source-text">来源: ${questionData.source}</div>`;
            
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                // 高亮正确答案
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                    child.style.backgroundColor = '#d4edda';
                    child.style.borderColor = '#c3e6cb';
                }
                // 如果选错了，高亮错误选项
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                    child.classList.add('incorrect'); // 需要添加CSS样式
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        function showFinalScore() {
            document.querySelector('.quiz-body').style.display = 'none';
            document.getElementById('quiz-footer').style.display = 'none';

            const correctCount = score;
            const totalQuestions = quizData.length;
            const answeredCount = userAnswers.filter(a => a !== null).length;
            const wrongCount = answeredCount - correctCount;
            const skippedCount = totalQuestions - answeredCount;
            const accuracy = totalQuestions > 0 ? Math.round((correctCount / totalQuestions) * 100) : 0;
            const errorRate = totalQuestions > 0 ? Math.round((wrongCount / totalQuestions) * 100) : 0;

            const finalScoreHtml =
                '<div class="final-score-container">' +
                '<h2>答题报告</h2>' +
                '<div class="score-summary">' +
                '<div class="score-card">' +
                '<h3>得分</h3>' +
                '<p>' + correctCount + ' / ' + totalQuestions + '</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>正确率</h3>' +
                '<p>' + accuracy + '%</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>错误率</h3>' +
                '<p>' + errorRate + '%</p>' +
                '</div>' +
                '<div class="score-card score-details">' +
                '<table>' +
                '<tr><td>正确</td><td>' + correctCount + '</td></tr>' +
                '<tr><td>错误</td><td>' + wrongCount + '</td></tr>' +
                '<tr><td>未答</td><td>' + skippedCount + '</td></tr>' +
                '</table>' +
                '</div>' +
                '</div>' +
                '<div class="report-actions">' +
                '<button id="review-btn">回顾测验</button>' +
                '<button class="primary" onclick="location.reload()">再试一次</button>' +
                '</div>' +
                '</div>';

            let reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }
            quizContentEl.insertAdjacentHTML('beforeend', finalScoreHtml);
            document.getElementById('review-btn').addEventListener('click', reviewQuiz);
        }

        function reviewQuiz() {
            const reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }

            document.querySelector('.quiz-body').style.display = 'block';
            document.getElementById('quiz-footer').style.display = 'flex';
            
            currentQuestionIndex = 0;
            loadQuestion();
            updateNavigationButtons(); // Ensure nav buttons are correctly displayed
        }

        // Event Delegation for options
        optionsListEl.addEventListener('click', (event) => {
            if (event.target && event.target.matches('li.option-item')) {
                // Check if the question has already been answered
                if (userAnswers[currentQuestionIndex] === null) {
                    const selectedIndex = parseInt(event.target.dataset.index, 10);
                    selectOption(selectedIndex);
                }
            }
        });

        prevBtn.addEventListener('click', goToPreviousQuestion);
        nextBtn.addEventListener('click', goToNextQuestion);
        hintBtn.addEventListener('click', showHint);
        
        // 初始加载
        loadQuestion();
      </script>
    </body>
    </html>
  